First let me ask.. are you weighing at the same time of day as when you set the eggs?.. because you can have a big difference in weight if you weigh in the morning one time and the evening another
also I suspect your hygrometer is off since none of the eggs are losing too little weight
since you are incubating a little lower it's should take longer than the 50 days (so don't panic if the eggs on the bottom take a few days longer to hatch) .. which will change your percentage of loss per day by a very small amount... but should remain constant for overall weight loss through out incubation.. in other words if an egg needs to lose X grams of weight it needs to do that regardless of if the incubation takes 50 days or 60.
if you check page 111 of the handbook there is a chart for weight loss.. it should help you some with the target goal..
and remember 12 to 15% +/- 1.2% is the goal.. you don't want to hit into the danger zones (10% or 20% weight loss).. the closer you can stay into the target range the better it is for the chick.. I had one at 17.27% and the chick hatched (had a bloody navel and was a little dehydrated) but today he's fine..
Egg #1 - 636 grams
Day 7 (3/17) - 625 - 11 grams or 1.73%
for egg 1 to lose 15% (95.4 grams) the final weight would need to be 540.6 which is a daily loss of 1.908 grams at 97.5ºF or 13.356 grams a week
so since you're pretty close to 97.5 for the first egg it should weigh close to 623 grams..
at 20% (danger zone) it would be 17.808 grams a week lost.. with week 1 weight reading 618 grams
Egg #2 - 538 grams
Day 7 (3/17)- 528 - 10 grams or 1.859%
to lose 15% (79.2 grams) with a final weight of 448.8.. daily loss: 1.584 grams .. 11.088 grams a week
after week 1 the egg should weigh around 527 grams
Egg #3 - 631 grams
Day 7 (3/17)- 621 - 10 grams or 1.585%
to lose 15% (94.65 grams) with a final weight of 536.35.. daily loss: 1.893 grams .. 13.251 grams a week
after week 1 the egg should weigh around 618 grams
Egg #4 - 593 grams
Day 7 (3/17)- 580 - 13 grams or 2.192%
to lose 15% (88.95 grams) with a final weight of 504.05.. daily loss: 1.779 grams .. 12.453 grams a week
after week 1 the egg should weigh around 580.5 grams
Egg #5 - 572 grams
Day 7 (3/17)- 559 - 13 grams or 2.273%
to lose 15% (85.8 grams) with a final weight of 486.2.. daily loss: 1.716 grams .. 12.012 grams a week
after week 1 the egg should weigh around 560 grams
Egg #6 - 548 grams
Day 7 (3/17)- 530 - 18 grams or 3.285%
to lose 15% (82.2 grams) with a final weight of 465.8.. daily loss: 1.644 grams .. 11.508 grams a week
after week 1 the egg should weigh around 536 grams
at 20% weight loss it would be a loss of 15.344 grams a week with week 1 weight of 532.656 grams.. so this one has a cause for concern.. is it directly in front of a fan?Or does the shell look a lot different than the other eggs?
Egg #7 - 561 grams
Day 7 (3/17)- 545 - 16 grams or 2.852%
to lose 15% (84.15 grams) with a final weight of 476.85.. daily loss: 1.683 grams .. 11.781 grams a week
after week 1 the egg should weigh around 549 grams
at 20% weight loss it would be 15.708 grams .. week 1 weight loss 545.292.. so this one is also in the danger zone
instead of playing with the humidity (which I suspect is ok even if your hygrometer is off).. check the relationship between the eggs with major problems to the fan.. also check the shell's color and texture since they also play a part in how quickly an egg loses weight
most of your eggs look ok.. especially if you aren't weighing at the same time each day.. also the first week can be a little wonky depending on how long it took the eggs to adjust to the bator.. either way it's still a good idea to monitor eggs that are really off on weight loss.. being off by a gram or so at each weekly weigh in isn't that big of a deal so long as overall weight loss goes according to plan..f
or the few that look like they aren't losing quite enough.. maybe move them around in the bator a little and see if that helps.. I have found that moving my eggs around every day (once a day) helped even out a lot of the weight loss in eggs that were having issues.. a fan can dry out some rather quickly.. so the ones that are losing too little can be moved closer to the fan and the ones that are losing too much should be moved away from it.. rotating them around once a day seemed to be just what mine needed
Raptor made some graphs for his (her?.. sorry Raptor.. don't know if you're a guy or gal) eggs.. so you might find it easier to see if the eggs are losing too much weight (or not enough) by making a graph
I'm hoping my math is correct (i did round off a few final weights to the nearest whole number) .. but it's early and my brain cell hasn't come out to play yet.. lol.. so if my math is off please correct me
Thanks for sharing
